Modular Synth Midi A guitar pickup is actually similar to a vibrant microphone coil. For decades, dynamic microphones have already been sent with the voice coil attached with the principal of the microphone's transformer, and not referenced to surface (‘floating'). The microphone's event is typically attached to the wire guard, that will be attached to the microphone amplifier's soil (see Rane's web site for more discussion).
By and large, active microphones are extremely quiet products consequently of the combination of transformer solitude and healthy, flying transmission lines during, as well as protected, humbucking coils.
Therefore why not instruments? Instruments are notoriously affected by noise. Humbucking pickups are merely a partial (though crucial!) solution. The most obvious option is always to float practicing the guitar pickup to a healthy output, being a microphone. A similar idea was printed this 2001 patent application such as Modular Synth Midi?